Stay-bolt.



PATENTED 20 1906.

5, BE TATE STAY BOLT. APPLIUATIOH F ILED JAH. 31 1905.

, combinations and JOHN snnon TATE, or ALTOONA.

FLA NNERY BOLT PENNSYLVANIA, ASSIGNOR TO COMPANY, OF PITTSBURG, PENNSYLVANIA.

STAY-BOLT.

Specification of Letters Patent.

Patented Feb. 20,1906.

Application filed January 31, 1905. Serial No. 243,568.

To (til whom it may concern:

Be it known that 1, JOHN Bacon TATE, of Altoona, in the county or" Blair and State of Pennsylvania, have invented certain new and useful Improvements in Stay-Bolts and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it app ertains to make and use the same.

My invention relates to an im roved staybolt, and more particularly to leXible stay-v bolts, the object of the invention being to improve upon the construction disclosed inPatout No. 753,329, granted to John B. Tate, lilarch 1, 1904 and the invention consists in certain. novel features of construction and arrangements of parts, as Jill be more fully hereinafter described, and pointed out in the claim.

In the accompanying drawings, Figure 1 is a. view in side elevation. longitudinal section thereof, and Fi s. 3, l,

and 5 are views oi various-shaped b0 ts.

1 represents the fire-box plate, 2 the outside or shell plate, and 3 a bolt connecting them. The plate 2 is made with a screwthreadcd opening, into which an externallyscreW-thrcaded sleeve or bushing is located, and this slecveor bushing 5 has a cap-nut 4 screwed onto its ontwardly-protruding end. The outer portion of the sleeve or bushing 5 is made with a semispherical socket 7 to re ceive the partly-spherical head 6 of bolt 3, and the inner portion of the sleeveor bushing 5 is internally flared, permitting pivotal movement of the bolt in any direction. The inner face of the cap-nut 4: partly spherical and substantially concentric with. the splierical. portion of the bolt-head, the constructron being such that when the cap is in place a clearanciis-space J' will be the bolt-head an?! the partly-spherical sur Face of the interior of the cap. This clearance-space 8 between the spherical head of the bol the on t of great importance, as it not only provided between permits the pivotal movement of the bolt,

even though more or less scale might collect in said clearance-space, but also permits of the expansion and contraction of the bolt, and

thereby insures a free pivotal action of the Fig. 2 1s a view in t and the partly-spherical interioroftion.

great bolts having a different-sized head a, different size of sleeve or bushing and cap may housed, and for convenience each series of bolts with sleeve or bushing andcap are given a single designating letter or numeral or other character. The internal diameter of the sleeveor bushing at its narrowest point or neck is sufficiently large to provide clearance all around the bolt and permit the entrance of bolts of various sizes, thus allowing'of the substitution of new 7 same sleeve or bushing for bolts which'have become broken or otherwise dama ed in use.

Slight changes might be made int egeneral form and. arrangement of the parts described without departing from III invention, and hence I would have it understood that. I do bolts of larger size in thenot restrict myself to the precise details set forth, but consider myself at liberty to make such slight changes and alterations as fairly fall within the spirit and scope of my inven- Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

The combination with-a stay-bolt, of a sleeve or bushing having a partly-spherical socket, an enlarged substantially s herical head on the bolt to fit the socket an outwardly beyond the same, and a cap-nut on the sleeve or bushin havin a partly spherical inner surface su listantia 1y concentrio with the bolt-headand constructed to provide a chamber or clearance-space betweenthe head of the bolt and said. partlyspherical surface in the cap.

Intestimony whereof i have signed this specificationfin the presence of two subscribing witnesses.

JOHN BRUCE TATE.

Witnesses:

F. B. Parrnnson, C. F. D. Mnrzenn.

project 

